Engine-starter.



V. BENDIX & F. S. ELLETT.

ENGINE STARTER.

APPLICATION FILED AUG.26. 1916.

1 28,476, Patented Dec. 24, 1918.

20 wheel thereof. This transmission or drive rnp snares PANT onn c.

vI onNnnnNnIx, or on oaeo, ILLINOIS, AND FREDERICK s. ELLETT, or ELMIRA,

New vonxf; SAID nnLi-fsirr'r ASSIGNOR r ECLIPSE MACHINE COMPANY, on ELMIRA,

NEW YORK, A oonronA'rIoN on NEW YORK.

ENGINE-STARTER.

meat-7e.

Specification of Lettas Patent.

Patented Dec. 24, 1915.

Application filed August 26, 1916. Srial No. 117,026.

new and useful Improvements in Eng'ine Starters, of which the following is a specification. r @ur in vehtion' relates to that type of engine starter more particularly to the transmovement therewith. The pinionis weightsliihtly greater than the thickness of the mission or drive-portion-thereof, as exemplified in patents heretofore issued to the said Bendix, for instance, Patent No. 1,172,864, issueddn February 22, 1916; which starter is characterized by a prime-mover such as an electric motor" and a transmi$ion or drive for transmitting the power or motion of the motor by means of a screw shaft device to a member of the engine, such as the flycomprises a screw shaft operated either directly or indirectly by the electric motor and a pinion screw-threaded on such shaft for longitudinal movement thereon and rotary ed or overbalanced by means of an overbalanced disk or the like and the object of our invention is to provide a construction of pinion and weighted disk whereby the disk is securely and efiectually fastened ,to the pinion. In the drawing, Figure 1 is an elevation of a pinion (partly in section) and a weighted disk embodying m invention, the view being taken looking at the pinion end of the structure; Fig. 2 an elevation thereof looking at the disk end of the structure; Fig. 3 a section on the line 3-3 of Fig. 1 and Fig.4 a detail section of the weighted disk alone.

Referring to the embodiment of our invention as herein shown, the pinion 1 is provided on its circumference with teeth 1 extending all the way across the body of the pinion longitudinally thereof, but said teeth at the weight end of the pinion are partially cut away to give a polygonal formationin the present instance hexagonal. As a result, with a inion having twelve teeth as herein shown 1; e alternate teeth are out down practically to their base while the remaining teeth are out half way down but at an angle corresponding to an inner angle of a hexagon as shown at 1".

The weight comprises a disk 2 and a weight proper 2 which here constitute a thickened semi-circular marginal flange on the disk. This disk is provided with a central hexagonal opening 2* which fits accurately the hexagonal reduced end of the pinion, the inner face thereof when applied to the pinion fitting against the shoulder 1 of the pinion teeth, as shown in Fig. 3.

After the disk is applied to the pinion, the parts are securely fastened against detach .mentby a swaging operation which consists in distortingthe metal of the disk and of the pinion along their hexagonal sides. In prac-- the the swaging is done by the pressure or blow from a chisel, preferably first delivered along the hexagonal sides of the disk, thereby forcing the metal thereat into firm engagement with the hexagonal sides of the pinion. Thereupon a similar swaging operation along the hexagonal sides of the pinion rivets the metal thereon slightly over the hexagonal edges of the disk so that there is no possibility of the disk being removed from the pinion. In practice the pinion teeth are cut back or milled off to an extent dis with the result that the hexagonal portion of the pinion projects beyond the outer side or surface of the disk, thereby facilitating the swaging operation described.

We claim:

. 1. In an en e starter transmission or drive, the com ination with a screw shaft, of a driving member screw-threaded there- .on for rotary and longitudinal movement and having one and reduced to polygonal form, and a memberhavin a correspondthe member, and means for securing the disk to the said member. a

3. In an engine starter transmlssion or drive, the combination of a pinion having one end polygonal, a Wei hted disk having a corresponding polygona opening received by said polygonal portion of the pinion, and

means whereby the meeting polygonal sides drive, the combination of a rotatable and longitudinally movable driving member having one end reduced to polygonal form, a

disk which is weighted on one side of its axis and has a polygonal opening to receive said reduced end, and means for securing the member and disk together.

5. In an engine starter transmission or drive, the combination of. a pinion having one end polygonal and adisk having a polygonal opening corresponding to and fitting upon the polygonal portion of the pinion, the meeting polygonal sides of the pinion and disk being swaged upon each other.

6. In an en e starter transmission or drive, the com ination of a pinion having teeth extending from end to end thereof, but having such teeth at one end thereof cut away to form a polygonal end, and a disk having a corresponding polygonal opening Ellett adapted to fit upon the polygonal end of the pinion.

7. In an e 'ne starter transmission or drive, the com ination of a pinion havin teeth extending from endto end thereo but having such teeth at one end thereof cut away to form a polygonal end, and a Weighted disk having a corresponding polyg-.

the pinion.

' VINCENT BE'NDIX.

FREDERICK S. ELLETT. Witnesses to the signature of Vincent Bendix:

S. E. HiBBEN, ROBERT DOBBERMAN. Witnesses'to the signature of Frederick S J. T. FERGUSON, S. M. HUNT. v 

